Grain-scourer



(No Model.)

S; S. SHAVER.

GRAIN SGOURBR.

Patented Junev 18, 1889.

f l. d j m 7 ,im M. wf /0 UNITED STATES .PATENT OFFICE.

SILAS S. SHAVER, OF CLINTONVILLE, WISCONSIN.

GRAIN-SCOURER."

SPECIFICATION forming part of Letters Patent No. 405,611., dated June 18, 1889.

Application filed May 31, 1887. Serial No. 239,909. (No model.)

To all 1071/0111/ it may 0011/0611111:

Be it known that I, SILAs S. SHAvER, aciti Zen of the United States, residing at Clintonville, in the county of Waupaca and State of Wisconsin, have invented a new and useful Improvement in Grain-scouring Machines, of which the following is a specification.

My invention relates to machinery for scouring the various kinds of grain in the process of their preparation for being ground for food or other purposes, and may also be used for scouring and polishing coffee and rice; and the object of it is to provide a machine of simple construction, one easily operated, that requires but little power for its operation and but little care from the attendant, and is productive of results superior to those of the machines in general use. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure l is a side elevation of the machine with the frame-covering broken away to show the arrangement of the cylindrical screens, the feed-spouts, conveyer, and spouts for the exit of both the grain and refuse, a portion of the cylindrical screens being broken away for the purpose of showing the internal triangular screens. Fig. 2 is a vertical section of the machine upon the line .fr of Fig. l, as seen in looking toward its right-hand end. Fig. 3 is a plan view of wire-netting adapted to be used as a covering for either the cylindrical or triangular screens instead of perforated sheet metal, as illustrated in Fig. 1. Fig. 4c is an edge view of one of the circular plates forming the cylindrical screen7 and showing, also, the triangular support or ledge to which the inner screens are attached at the receiving end thereof; and Fig. 5 is a vertical section of a modified form of the cylindrical screen at the lines y y of Fig. 1, as it would appear vwhen looking toward the right.

`Similar gures and letters of reference indi cate like parts in the several views.

1 is the frame of the machine, within which the mechanism is supported.

2 is the covering or inclosing casing of the mechanism, it being shown as partly broken away in Fig. 1 for the better showing of the inclosed mechanism.

3 are shafts supporting the cylindrical screens 4.

5 are triangular screens partly supported upon and revolving with the shaft 3 and screen 4.

6 are screw conveyers.

7 is the feeding conveyerspout leading from the feed-elevator or grain-supply..

8 is the conveyer-spout for the transferring of the grain from the upper to the lower cylindrical screen.

9 is one for the final removal of the grain from the lower screen to an elevator or other point for any succeeding operation desired.

10 l0 are spouts through which the smut, bran, and dust which are rubbed from the grain by the friction thereof in its passage through the revolving screen is removed from the screw conveyer-channel 13.

1l and ll are circular plates or heads of the cylindrical screens, and 12 12 are coneshaped conveyers secured to the circular heads 1l 11 and revolving with them.

The construction of the screens is as -follows: Upon the shafts 3, which are adapted for revolutionl in a position slightly inclined from a horizontal line, are secured two circular plates ll l1', each having holes a and a', respectively, ofpany desired number or form near its periphery, those in the plate 11 forreceiving the grain into the cylindrical screen 4 and those in plate l1 forits discharge. Upon or near the circumference of the plates 11 and l1 is secured a covering of perforated. sheet metal, (sheet-steel is preferred,) the rough side'thereof, which is produced in forming the perforation b, being its inner surface. Upon the inside of said covering and longitudinally with it are secured a series of ribs c. Upon the circular plate 1l are formed ledges 11, they forming a triangle upon said plate, and upon the shafts 3, about six inches from the plate 1l, is a skeleton 3, its outer contour be ing similar in form and size to the triangle formed upon the plate 11 by the ledges aforesaid. The three sides of these triangular forms are covered with sheet metal, perforated like the aforesaid cylindrical screens, but with the diiference that the rough side thereof forms its outer surface. Attached to the plates ll are cone-shaped coverings 12, their smaller ends being open for admitting the lower end of the conductors 7 and 8.

The purpose of the ribs c is to carry the IOO grain to near the upperpart of the cylindrical screen as it is revolved,..where it is dropped upon the triangular screen and io the lowest part of the cylinder, again to be elevated and fall, as before, thus by the frictional contact of the grains with each other with the surfaces of cylindrical and triangular screens to loosen and rub the impurities therefrom.

The modified form of the material-corrugated sheet metal-when used as a covering for the cylindrical screen makes the application of the ribs c to its inner surface unnecessary, the corrugations thereof serving the same purpose as the ribs in lifting the grain as the cylindrical screen revolves. The surface of corrugated sheet metal should be perforated in like manner as the surface of the plain covering shown in Fig. 1.

The operation of the scourer is as follows: The cylindrical screens and screw conveyers being revolved by the pulleys upon the ends of their shafts, which are connected to any available motor by belts, grain is admitted through the conveyer-spout 7, running by its gravity into the cone 12, from which it passes through the holes a to the interior of the screen 4. It is then taken up by the ribs c and dropped therefrom upon the triangular screen 5, which in turn drops it to the lower portion of the cylinder, when it is again taken up, repeating said action upon the grain until the longitudinal inclination of screens has carried the grain to their lower ends, when it escapes through the holes a into the conductor 8, and is conveyed to the lower cylindrical screen.

The smut, dust,bran, &c., which are rubbed off in the above operation sift through the screen-perforations, fall into the screw conveyer-channel 13, and find their exit through vf.

ished in any complete grain-scourer as the` state of the grain and its purpose demand.

I do not claim, broadly, a revolving cylindrical screen, as they have long been used, as khave screw conveyers; but

What I do claim as new, and desire to secure by Letters Patent, is

The combination, in a grain-scourer, of an inclined inwardlypunched cylindrical screen, the inner surface of the screen being composed of elevated and depressed portions arranged alternately and longitudinally With the screen, whereby grain will be carried partially around the screen, feed-openings in the highest end of the screen, discharge-openings in the lowest end of the screen, and a triangular outwardlypunched screen within and shorter said cylindrical screen, one end thereof attached to the end plate of -the cylindrical screen at its highest end, the othersupported upon the shaft aforesaid independently of the lowest end of the cylindrical screen, substantially as described.

sILAs s. sHAvER.

Witnesses:

W. H. RICE, J. W. MORGAN. 

